Blown Headgasket?
Blown Headgasket?
If any car for that matter has a blown headgasket, and it is replaced, is that all that needs to be done? Anything else needing service, like a compression test or anything?
btw, this is not my car.
btw, this is not my car.
Where did the head gasket break? Between the cylinders? Is coolant leaking into a cylinder? Are oil and coolant mixing? If oil and coolant are mixing, then major damage may have been done to the bearings and/or rods.
If you catch it right away, yes. But alot of stuff should be replaced while you have the engine 1/2 apart. But you have to ask why did it blow? Overheating the engine to much can warp the head. so you might have to add a new head or a resurfaced head if it can be saved.
Originally Posted by Deckdout2
If any car for that matter has a blown headgasket, and it is replaced, is that all that needs to be done? Anything else needing service, like a compression test or anything?
btw, this is not my car.
btw, this is not my car.
ahhh, these are good answer that lead me to my next question. at first, the car was over heating, and there was a leak in the radiator. so the radiator, thermostat, and other cooling components have been replaced. car is still overheating as of today, so it's figured to either be the headgasket cause it to overheat, or the overheating has caused the head to blow. i don't have it apart yet, just wanted to get as much info as i can before i just go and change it and assume that it's all i need to do.
i need to check the other things you guys listed when i get into it then. any further other info from what i posted would help.
i need to check the other things you guys listed when i get into it then. any further other info from what i posted would help.
Overheating will often blow the head gasket. A blown head gasket will not cause an engine to overheat unless all the coolant is lost by it leaking into the cylinders or into the oil. Is there coolant in the oil? That is, does it look like chocolate milk? If it does, I would replace the engine.
If the engine oil is fine, then replacing the head gasket may be feasible. In any case the heads are probably warped. They're prolly not warped too bad and could be resurfaced at a machine shop. You can't know for sure until you take off the heads.
One question I have is how overheating affects an engine that is all aluminium. I would assume that the engine block could warp as well.
It might be better to just replace the engine since used VQ's are so cheap. The amount of labor would be comparable.
If the engine oil is fine, then replacing the head gasket may be feasible. In any case the heads are probably warped. They're prolly not warped too bad and could be resurfaced at a machine shop. You can't know for sure until you take off the heads.
One question I have is how overheating affects an engine that is all aluminium. I would assume that the engine block could warp as well.
It might be better to just replace the engine since used VQ's are so cheap. The amount of labor would be comparable.
Originally Posted by SR-71 Blackbird
Overheating will often blow the head gasket. A blown head gasket will not cause an engine to overheat unless all the coolant is lost by it leaking into the cylinders or into the oil. Is there coolant in the oil? That is, does it look like chocolate milk? If it does, I would replace the engine.
If the engine oil is fine, then replacing the head gasket may be feasible. In any case the heads are probably warped. They're prolly not warped too bad and could be resurfaced at a machine shop. You can't know for sure until you take off the heads.
One question I have is how overheating affects an engine that is all aluminium. I would assume that the engine block could warp as well.
It might be better to just replace the engine since used VQ's are so cheap. The amount of labor would be comparable.
If the engine oil is fine, then replacing the head gasket may be feasible. In any case the heads are probably warped. They're prolly not warped too bad and could be resurfaced at a machine shop. You can't know for sure until you take off the heads.
One question I have is how overheating affects an engine that is all aluminium. I would assume that the engine block could warp as well.
It might be better to just replace the engine since used VQ's are so cheap. The amount of labor would be comparable.
that explains quite a bit, and further verifies my understanding. thanks for the input. all others are welcome as well.
What kinda car are you talking bout here ?
I have seen quite a few diff head gasket failures in my days. Worst case scenario one of the coolant passages in the cylinder head cracked and requires welding up the crack. I would send the heads out to get magnafluxed for any cracks, and have them check it for straightness. Reason I ask bout what kinda engine this is, cause a few engines require for you to machine the heads with the cams bolted to the heads for perfect straightness- that is if its a OHC type head.
I did head gaskets on a few C32 Honda motors (Legends) and they are almost always within specs for straightness even thou the head gasket went. On my 94 Q45 with the VH45DE motor, gasket went out between the cylinder and the coolant passage, and coolant was being burnt at slow steady rate in the combustion chamber with no smoke out the tail pipe. I noticed that the drivers side head gasket was also leaking coolant externally right into the V of the motor- aka valley. I had no coolant in the oil. I am waiting for my cylinder heads from the machine shop, and I will be re-assembling the beast. My 91 Legend blew head gaskets the same way, my GF was able to drive it for a few months just topping the coolant off every week once, till I got around doing the head gaskets on it in May of this year. I never send the heads out on that car to get them checked for any problems, I just took a chance and slapped her all back togheter in one day. No coolant leaks, or consumption since then, and we've put quite a few miles on it since. My Q45 was building up alot of pressure in the cooling system due to the blow head gasket, and it blew apart a radiator end tank.
Let us know what kinda engine you are working on.
I have seen quite a few diff head gasket failures in my days. Worst case scenario one of the coolant passages in the cylinder head cracked and requires welding up the crack. I would send the heads out to get magnafluxed for any cracks, and have them check it for straightness. Reason I ask bout what kinda engine this is, cause a few engines require for you to machine the heads with the cams bolted to the heads for perfect straightness- that is if its a OHC type head.
I did head gaskets on a few C32 Honda motors (Legends) and they are almost always within specs for straightness even thou the head gasket went. On my 94 Q45 with the VH45DE motor, gasket went out between the cylinder and the coolant passage, and coolant was being burnt at slow steady rate in the combustion chamber with no smoke out the tail pipe. I noticed that the drivers side head gasket was also leaking coolant externally right into the V of the motor- aka valley. I had no coolant in the oil. I am waiting for my cylinder heads from the machine shop, and I will be re-assembling the beast. My 91 Legend blew head gaskets the same way, my GF was able to drive it for a few months just topping the coolant off every week once, till I got around doing the head gaskets on it in May of this year. I never send the heads out on that car to get them checked for any problems, I just took a chance and slapped her all back togheter in one day. No coolant leaks, or consumption since then, and we've put quite a few miles on it since. My Q45 was building up alot of pressure in the cooling system due to the blow head gasket, and it blew apart a radiator end tank.
Let us know what kinda engine you are working on.
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